Before we move on here's a brief review of all the operators we learned so far:
When using binary operators, you should leave at least 1 space between the operands (the things being operated on) and the operator. When using a unary operator, you should not leave any space. Remember, you should follow style conventions to help code be readable to humans.
Good style:
a += 1;
a = 5 - 1;
a++;
Bad style:
a+=1
a=5 -1;
a ++;